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• <br />• <br />SEDCAD 4 for Windows <br />f.n ,,inhf 10QA _W11n P-1. I Crh,.,.h <br />Structure #2 (Pond <br />Sec 28 Sed Pond <br />Pond Inputs: <br />Initial Pool Elev: 7,064.50 ft <br />w/o Freeboard w/ Freeboard <br />Design Discharge: <br />47.11 cfs <br />Depth: <br />1.88 ft <br />Top Width: <br />3.76 ft <br />Velocity: <br />13.36 fps <br />X- Section Area: <br />3.53 sq ft <br />Hydraulic Radius: <br />0.664 ft <br />Froude Number: <br />2.43 <br />Initial Pool Elev: 7,064.50 ft <br />Initial Pool: <br />1.67 ac -ft <br />*Sediment Storage: <br />0.00 ac -ft <br />Dead Space: <br />20.00% <br />*No sediment capacity defined <br />Perforated Riser <br />Riser <br />Riser Height <br />Barrel <br />Barrel Barrel Slope <br />Number of <br />Spillway Elev <br />Diameter <br />(ft ) <br />Diameter <br />Length g () ( % ) <br />Manning's n Holes per <br />(ft) <br />(in) <br />71.52% <br />Elev <br />18.00 6.601 <br />18.00 <br />150.00 2.00 <br />0.0150 7,069.60 2 <br />Pond Results: <br />Emergency Spillway <br />Spillway Elev Crest Length Left Right Bottom <br />(ft) Sideslope Sideslope Width (ft) <br />7,077.00 30.00 2.00:1 2.00:1 30.00 <br />Peak Elevation: <br />7,069.40 ft <br />H'graph Detention Time: <br />9.43 hrs <br />Pond Model: <br />CSTRS <br />Dewater Time: <br />1.34 days <br />Trap Efficiency: <br />71.52% <br />Dewatenng time is calculated from peak stage to lowest spillway <br />Elevation - Capacity- Discharge Table <br />24 <br />Filename: Sec 28 1024.sc4 Printed 12 -08 -2010 <br />Exh. 7- 20A -28 Revision Date: 12/31/10 <br />Revision No.: TR -81 <br />